摘要
基于试验结果,分析垫层刚度对复合地基中桩顶及桩间土表面应力发挥进程的影响,指出对于土质相对较好的地基中应用夯实水泥土桩复合地基,会因垫层刚度的不同造成复合地基破坏模式的改变,从而影响复合地基的承载力的大小。因此,天然地基土相对较好的地基土质条件下,为防止桩身过早压坏,导致p–s曲线产生陡降,合适的垫层刚度非常重要。载荷板宽度不同会造成垫层刚度的差异,采用载荷试验确定复合地基承载力要考虑这种垫层刚度差异的影响。
Based on filed loading test results,the influences of cushion stiffness to the process of play of pile head and soil surface stress in composite foundation is analyzed.Cushion stiffness will affect bearing capacity and failure mode of composite foundation with rammed soil-cement pile,which is applied in a relatively good ground.Appropriate cushion stiffness is very important to prevent the pile from crushing and inducing abruptly descending in p-s curve.It points out that the cushion stiffness,which is different in various flat plate,must be considered when using loading test to determine the bearing capacity of composite foundation with rammed soil-cement pile.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2010年第S2期578-581,共4页
Chinese Journal of Geotechnical Engineering
关键词
夯实水泥土桩
复合地基
垫层
破坏模式
承载力
rammed soil-cement pile
composite foundation
cushion
failure mode
bearing capacity
